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Basic energetics suggest that E fb,SN ~ E fb,BH Timescale for energy injection is NOT equivalent  SP <  SF  The power can be very different Location of energy injection is different: quasar feedback is deposited in the galactic center, star formation feedback is spread throughout the galactic disk Feedback from Star Formation and Black Holes

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Significant coronae of hot gas is produced Emits X-rays ( consistent with E scaling relations ) Cooling time and entropy are increased ( Small systems may never cool and large systems are “primed and ready” for radio-mode feedback -see Phil’s talk from Monday ) Ejects metals AGN contributes ( significantly to the entropy ), but SN-driven winds dominate the ejection of mass and metals The Influence on Gas in the Merger Remnant